X-ray assisted point defects creation in micron-size Zn, Mo oxide particles at liquid nitrogen temperature

Abstract Charge trapping processes induced by the X-ray irradiation in the heavy Mo doped ZnO and MoO 3 micropowders synthesized by the hydrothermal growth method were investigated in detail. Electron paramagnetic resonance (EPR) and thermally stimulated luminescence (TSL) were applied in a correlated manner to discover the role of the Mo doping in the charge trapping processes in ZnO. Thermally unstable oxygen- and molybdenum-related charge trapping centers were studied. Molybdenum and oxygen created electron-hole trapping pairs in some cases were observed. Some part of the hole trapping centers seemed to be directly connected with the creation of Mo 5+ . The correlation between EPR and TSL data was found.